EP0426919A1 - Hot gas soldering system - Google Patents
Hot gas soldering system Download PDFInfo
- Publication number
- EP0426919A1 EP0426919A1 EP89311638A EP89311638A EP0426919A1 EP 0426919 A1 EP0426919 A1 EP 0426919A1 EP 89311638 A EP89311638 A EP 89311638A EP 89311638 A EP89311638 A EP 89311638A EP 0426919 A1 EP0426919 A1 EP 0426919A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- soldering
- heating element
- heating
- carried
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/012—Soldering with the use of hot gas
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
- This invention relates generally to the field of hand held soldering/desoldering tools and, more particularly, to such instruments which utilize a stream of gas to convey heat from its source along at least a portion of the path to the soldering point, the term "hand held" being intended to include robotic or robot-like applications. The term "gas" as used here usually means ambient air, but may include inert or relatively inert gases such, for example, as carbon dioxide or nitrogen or the noble gases or the like as when oxidation, corrosive reactions, or other undesired chemical action is to be minimized.
- The advantages of hot gas soldering have become known and understood in recent years and are discussed in detail in Applicant's co-pending application Serial No. 47,771 filed May 8, 1987, the original parent case of which was Serial No. 471,091 filed March 1, 1983 and now abandoned. Both applications were entitled "Hot Air Soldering Instrument". It suffices here to point out that hot gas soldering by a stream of very hot gas with a very small cross section can apply precisely the desired quantity of heat at precisely the desired work point without deleteriously heating other adjoining or contiguous material or objects. In addition, the gas stream presents to the work point a substantially constant temperature heat source - unlike a conventional soldering tip the temperature of which inherently varies somewhat as varying amounts of heat are drawn therefrom and then replenished along a metal conduction path. A related advantage is that the gas may be heated instantly as it flows across, in heat exchange relation, the heat source and is instantly applied to the work point while a conventional soldering tool, exhibiting a significantly greater degree of thermal inertia, requires that heat be conducted through the solid components of the tool until the tip, inherently at some distance from the source, reaches a temperature adequate for working.
- It may also be pointed out that by hot gas techniques, a thin-walled, low inertia soldering tip may be heated on its inside by an internally directed stream of hot gas providing most of the above advantages. In addition, although the soldering action is more like conventional soldering, the tip may be very desirably of iron composition since copper is not needed for its high thermal conductivity. Thusly avoided are the weight and expense of copper and its plating as well as its high vulnerability to decay by chemical reactions aggravated by its intense thermal environment.
- These and other advantages of hot gas soldering have not been achieved in the prior art because of the difficulty of generating the gas stream, satisfactorily heating it, and providing means for shaping it and directing it upon the work point.
- It is accordingly an object of the present invention to provide an improved hot gas soldering system.
- The present invention is hot gas soldering apparatus comprising a base housing body; electric power supply means carried therein for energizing a soldering gas heater; electronically remote control temperature control circuit carried by said housing body; gas supply flow control means carried by said housing body; soldering tool holding means carried by said housing body; a hot gas soldering tool having a handle portion, an electric heating element carried by said handle portion and coupled to said electric power supply and said temperature control circuit; gas heating means connected to said gas supply control means for transferring heat from said heating element to said gas, and soldering gas jet forming means coupled to said gas heating means for causing the heated gas to impinge upon and heat a predetermined soldering point, and combination hose and electric conductors means connecting said housing body and said handle portion, the conductors being disposed within said hose, and said hose also constituting a carrier of said gas from said housing body to said hot gas soldering tool.
- Embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which
- FIGURE 1 is a perspective view of an example of a hot gas soldering system constructed in accordance with the principles of the present invention;
- FIGURE 2 is a partially exploded perspective view of the base unit thereof;
- FIGURE 3 is rear elevational view of the base unit;
- FIGURE 4 is a view, partially in longitudinal section, of the handle and supply cord thereof;
- FIGURE 5 is a longitudinal sectional view of the soldering tip end thereof;
- FIGURE 6 is a longitudinal sectional view of portions of the handle and heater thereof with an alternate soldering tip;
- FIGURE 7 is a cross sectional view of the structure shown in FIGURE 6 taken along the reference lines 7-7 thereof;
- FIGURE 8 is a cross sectional view of the structure shown in FIGURE 6 taken along the reference lines 8-8 thereof;
- FIGURE 9 is a cross sectional view of the structure shown in FIGURE 6 taken along the reference lines 9-9 thereof;
- FIGURE 10 is a cross sectional view of the structure shown in FIGURE 6 taken along the reference lines 10-10 thereof;
- FIGURE 11 is a cross sectional view of the structure shown in FIGURE 6 taken along the reference lines 11-11 thereof;
- FIGURE 12 is an exploded, perspective view of a portion of the apparatus shown in FIGURE 5.
- FIGURE 13 is a similar view of two alternative tip arrangements of the invention.
- FIGURES 14, 15 and 16 are similar views of further alternative tip arrangements all in accord with the principles of the present invention; and
- FIGURE 17 is a view like FIGURE 1 illustrating additional and alternative features of the invention.
- The example of the invention illustrated in FIGURES 1, 2, and 3 includes a
base unit 10, a hand heldsoldering instrument 12 having ahot gas tip 14, and aninterconnecting supply line 16 for carrying electrical leads and gas to theinstrument 12. A removeable insulated andprotective holder 18 for theinstrument 12 is shown attached to thebase housing 20 by the central one of three mating slip-onbrackets holders 18 and the twooutside brackets - The
housing 20 also carries an electricalpower inlet terminal 26, an auxilliary parallelpower outlet terminal 28, a gassupply inlet terminal 30 which may be connected to an air compressor, not shown, or other source of pressurized gas, a gassupply outlet terminal 32, and anelectrical outlet terminal 34, the latter two terminals being connected, as shown in FIGURE 1 to the common cord/hose tube of thesupply line 16 which in turn is connected to thehandle 36 of thesoldering instrument 12. - Contained within the
housing 20 is apressure regulator unit 38 for controlling the flow of gas to the solderinginstrument 12. Theunit 38 includes an on-offvalve 40, aregulator control 42, and anoutput pressure meter 43. - An
electronic circuit board 44 receives power from an external source viaterminal 26 and a pair ofinternal leads 46, 48. An associatedground lead 50 connects theterminal 26, thecircuit board 44, theoutput terminal 34, and, ultimately, the exposed metal portions of thesoldering instrument 12 to the ground of the external electric power source. Thereference numeral - The electronic circuit of the
board 44 is, in this example, of the character to control remotely the temperature of the heating element of the solderinginstrument 12 by using for a very short portion of the period of each cycle, including an inflection point, of the applied alternating current to effect a resistance measurement of the electrical heating element, the magnitude of that electrical resistance being a function of its temperature. A signal representative of the instantaneous value of the resistance is generated which is used in a feedback sense to control the current flow to the heating element to cause it to maintain a predetermined desired temperature. Thusly, without a separate sensor in the soldering tip and without separate leads being used for a temperature feedback signal, essentially full wave power is continuously impressed on the heater. This technique and its application as herein is described in U.S. Patent No. 4,507,546 issued March 26, 1985, and U.S. Patent No. 4,734,559 issued March 29, 1988, both to William S. Fortune and Wayne A. Murray. Asingle control 52 is used for on-off and soldering tip temperature setting. Apilot lamp 54 is shown for indicating when the circuit is energized and when power is actually being supplied to the heater element, the different "on" modes being distinguished, for example, by a constant versus an alternating illumination of thelamp 54. - To complete the description of the
base unit 10 andhousing 20, it may be noted that atip cleaning sponge 56 moistened by a water, or other cleaning fluid,reservoir 58 is shown at its forward end. Asmall tool tray 60 may be provided, as shown, for holding items such as extra tips, a tip wrench, or the like. The base unit is molded of a relatively high density, impact resistant plastic and is preferably carbon loaded or otherwise made adequately conductive to preclude any build-up of static charge. - Referring to FIGURE 4, the
composite supply line 16 is shown to include acable connector 34′ for mating with thehousing terminal 34 and carrying four leads: two power leads 62, 64, a fibreoptic lead 66, and abare ground wire 50′ along aconnector cord 68 to a Y junction fitting 70 with agas supply tube 72 for connection by acoupler 74 to thegas outlet terminal 32. Thecord 68 is blocked with respect to passage of any of the gas therethrough. The fitting 70 couples thegas supply tube 72 to thecomposite supply line 16 whereby gas from theregulator unit 38 is carried through the hollow interior of theline 16 to the interior of thehandle 36 of thesoldering instrument 12. An enlargeddiameter retainer bushing 76 is forced within the end of theline 16 inside thehandle 36 to lock the tube to the soldering instrument. The four leads, electrical and optic are also carried within theline 16 which may readily be of the character to be appropriately insulative, flexible, and mechanically protective of the leads. In addition, the material of theline 16 may be sufficiently loaded or coated to prevent static charge build-up. - It is important to note two effects within the
supply 16 as the gas flows therethrough: 1) static electricity which may otherwise accumulate because of the gas flow over the dieletric materials therein and cause a high and deleterious potential is effectively conducted away by thebare ground lead 50′; and 2) the supply is somewhat preheated by its flow over the current carrying leads 62, 64 which are warmed due to their inherent I²R losses. - Surrounding the forward portion of the
handle 36 is disposed afinger guard 78 which includes a large diameterforward flange portion 80 having a central opening through which the baseend plug body 82 of theheater assembly 84 passes. Askirt portion 86 formed integrally and concentrically with theflange portion 80 extends rearwardly therefrom over the forward portion of thehandle 36. An annular gap is provided between the skirt portion and the handle's outer surface to insulate the finger guard and to provide further cooling for operator comfort by the forced flow therethrough of the pressurized gas from the plenum of the interior of thehandle 36. The actual flow path is shown in detail in subsequent figures. - The
plug body 82 has an enlargeddiameter retaining shoulder 88 disposed within the finger guard; and an elastameric o-ring 90 is shown disposed compressively between the rear of theflange portion 80 and the retainingshoulder 88. Theplug body 82 behind the retainingshoulder 88 is disposed within the forward end of thehandle 36 except for a pair of rotation resisting,mating tabs 92 andnotches 94 on these respective elements. The assembly is held together by a diametrically opposed pair oflocking tabs 96 molded on the exterior of thehandle 36 and a matching set ofslots 98 formed on the inner surface of theskirt portion 86. With the sets oftabs 92 and notches 94 in line, thehandle 36 is pushed forwardly against the rear of theretaining shoulder 88 which in turn compresses the o-ring 90 against theflange 80 until thetabs 96 pop into theirrespective slots 98. The assembly may be taken apart by pressing the plastic,deformable skirt portion 86 radially inwardly at a pair of diametrically opposed points thereon disposed angularly 90° from theslots 98. - Other elements of the
heater assembly 84 illustrated in FIGURE 4 are theutility threads 100 for affixing special tips and accessories to the instrument, a portion of itsmetal sheath 102 with itsgrounding lug 103, the rear end of theceramic heater cylinder 104 with one of itselectric terminals 62′, 64′, and somesilastic potting material 106 to plug the end of the cylinder against airflow therethrough and to retain thefiber optic lead 66. - Referring to FIGURE 5, the forward end of the heater assembly of this example of the invention is shown to include the
metal sheath 102 terminated at its forward end by a reduced diameter portion formed with pressedthreads 108 manifest on both its inner and outer surfaces. Aretainer bushing 110 is threaded into the inner of thethreads 108 until its forwardlarger diameter portion 112 is tight against the end of themetal sheath 102. Acentral bore 114 retains the forward enlarged diameter end 116 of agas circulator tube 118. A threadednozzle tip 120, as an example of thetip 14 shown in FIGURE 1, is shown screwed onto the outer of thethreads 108 to retain theflanged tube 118 tightly against and within theretainer bushing 110. - Most of the length of the
circulator tube 118 is wrapped with a heat exchange enhancing filamentary element in the form of ametallic spring 121 wound snugly about its outer surface. This portion of the circulator tube is disposed within the forward end of theceramic heater tube 104 axially contiguously to theactual heating element 122 which is deposited on theceramic tube 104 then glazed over with a very thin glass or ceramic insulative coating and may be of the type obtained from, for example, Kyocera in Kyoto, Japan, Model No. F1495. - Wrapped around the
ceramic heater tube 104 contiguously to theheating element 122 is a second heat exchange enhancing filamentary element in the form of ametal tape 124 wound snugly over the outer surface of the ceramic cylinder. - The
metallic sheath 102 surrounds the ceramic tube and is spaced therefrom to form a cylindricalannular heating chamber 125 and path for the soldering gas. As indicated by thegas flow arrows 126, gas from the handle plenum, as described below, is fed along theannular chamber 125 over thewound tape 124 for enhanced heat pick-up, thence around theend 128 of theceramic cube 104, cack along the innerannular chamber 129 over the spring likeelement 121 for more turbulence and heat pick-up from the ceramic heater tube, then forwardly again through the interior of thecollector tube 118, and finally forwardly out through thebore 130 of thenozzle tip 120. - Referring to FIGURE 6, a more detailed view of the interior of the
handle 36 andheater assembly 84 is shown with, however, an alternative tip arrangement. The full length of theceramic heater tube 104 is shown, with one of itselectric terminals 62′, andsilastic material plug 106 at its rear, base end. The fibre optic and electric leads 66, 62, 64 are shown schematically, along with theground lead 50′, extending rearwardly from the ceramic tube. Anannual spacer ring 132 centers theceramic tube 104 within theplug body 82 and a second quantity of silastic material forms a retainingplug 134 to seal theceramic tube 104 to theplug body 82. Themetal sheath 102 is press fitted into the forward portion of the plug body and is securely retained therein by its flaredend 136. Gas flow communication between theannular space 125 and the plenum interior of thehandle 36 is provided by radially extendingbores 138 in the wall of theplug body 82. Gas flow between the plenum and the annular space between theskirt portion 86 of thefinger guard 78 and the outer surface of thehandle 36 is provided by the axialannular gap 140 between the retainingshoulder 88 of theplug body 82 and the forward end of thehandle 36 which is maintained by the contact of the extra length of lockingtab 92 in theshorter notch 94 of the handle 36 (see FIGURE 4). - The
fibre optic lead 66 which extends from, in this example, alight source 66′ on thecircuit board 44 is shown terminated in alens 142 for projecting light forwardly along the central bore of the soldering instrument whereby a beam of light normally illuminates the work point for the operator and shows him where the hot gas will impinge upon the work piece. This feature may be understood by considering the basic hot gas nozzle tip arrangement of FIGURE 5 since in the alternative arrangement of FIGURE 6, the central bore is optically blocked by asolid tip 144 which is held in place by aretainer nut 146 threaded onto the outer of thethreads 108 of themetal sheath 102. An inwardly extending retainingshoulder 148 of thenut 146 engages an outwardly extendingshoulder 150 on the body of thetip 144. Thenut 146 is turned onto thethreads 108 until the base end of the tip is compressed tightly against a fixedcollar 152 on an elongatedgas circulator tube 154 which extends well into the heater portion of theceramic tube 104 and forwardly concentrically into an oversizedcentral bore 156 in thetip 144. The bore extends axially forwardly of the end of the circulator tube whereby the hot gas flowing through the long,central bore 155 of thecirculator tube 154 passes out of its forward end and impinges upon the forward bottom of thebore 156 of thetip 144 and returns along theannular gap 158 between thetube 154 and thebore 156 and exhausts through radially directedports 160. It may be noted that the forwardinner surface 147 of thenut 146 is conically shaped for turning the exhausted gas forwardly toward the work point. This feature not only provides a means for blowing overly noxious fumes from the work area but may, when desired, be used to preheat gently the general area of the work point. - In this form of the invention, the tip functions much as a conventional soldering tip but with the advantage that it heats very quickly since the heat is carried by fast flowing hot gas and not by conduction through a high inertia metal path. Accordingly, the tip materials can be of iron instead of copper and iron plated copper thus avoiding the highly undesireable plating process and its expense as well as the weight and corrosion vulnerability of copper. It should be noted that gas heated tips according to this invention may be considerably thinner walled than implied by the geometry of the
tip 144 as illustrated. - FIGURE 7 is an enlarged cross section view taken through the
tip 144 showing its solid iron body, thecirculator tube 154, the central gas flow path of thebore 155, and the return path of theannular gap 158 between the tip and the inner tube. - FIGURE 8 is similar view taken further rearwardly and showing the exhaust bores 160 and the gas directing conical
forward surface 147 of theretainer nut 146. - FIGURE 9 is a cross sectional view taken further rearwardly and shows the
ceramic heater tube 104 with its depositedheater element 122 and wrapped by theflat metal tape 124 heat exchange enhancer. Concentrically disposed within the ceramic heater tube is thegas circulator tube 154 similarly wrapped by the spring-like 121 heat exchange enhancer. This view illustrates the three concentric, in-cascade hot gas flow paths: theannular gap 125 over thetape 124 and between theouter metal sheath 102, theannular gap 129 over thespring 121 and between theceramic tube 104 and theinner tube 154, and finally theinner bore 155 thereof. - Referring to FIGURE 10, the essentially concentric geometry of the handle portion of the
soldering instrument 12 is shown to include theouter handle portion 36 circumscribed by theskirt portion 86 of thefinger guard 78. The lockingtabs 96 andslots 98 thereof are shown in elevation and dashed lines, respectively. Theangular locking tabs 92 andnotches 94 of theplug body 82 and handleportion 36, respectively, are also illustrated in this view. Immediately radially inwardly of theplug body 82 is shown themetal sheath 102 just forwardly of its flaredrear end 136. This view also shows itsgrounding lug 103 extending rearwardly from themetal sheath 102. In turn, within the metal sheath is disposed theceramic tube 104 and thefiber optic lead 66. - The similar view of FIGURE 11 taken just rearwardly of the previous figure shows again the
outer skirt portion 86 of thefinger guard 78, thehandle portion 36 and the lockingtabs 96 andslots 98 thereof, the rear portion ofplug body 82 filled with thesilastic potting material 134, the rear portion of theceramic heater tube 104, and the innerfiber optic lead 66. - In FIGURES 12, 13, 14, 15, and 16, a series of alternative hot gas soldering tips and their respective circulator tubes are shown.
- The combination of FIGURE 12 is essentially like that shown in FIGURE 5 except that the
retainer bushing 110′ is fabricated integrally with thecirculator tube 118′ and is not threaded. Thebushing 110′ -tube 118′ and heatexchange enhancer spring 121 are retained within the end of thesleeve 102 by screwing the threadednozzle tip 120 onto thethreads 108 of the forward end of thesleeve 102. - In FIGURE 13, two examples are shown which are similar to that of FIGURE 6 except that the elongated
gas circulator tube 154 is used to direct a well defined stream of hot gas directly onto the work point instead of to heat the rear, inner surface of atip 144; that is, thetip 144 is simply removed from behind theretainer nut 146 so that the forward end of thecirculator tube 154 may direct the hot gas directly to the work point. The other example of FIGURE 13 combines thecirculator tube 118′ of the structure shown in FIGURE 12 with a finer, smaller diameter forward extension tube 164 having acentral retaining collar 165 and therear portion 166 of which fits within thecirculator tube 118′ andforward portion 168 of which extends beyond theretainer nut 146 for use when a particularly fine and precise jet of soldering gas is desired. - In FIGURE 14, the example shown is essentially like that of FIGURE 6 shown in an exploded form without the
retainer bushing 110, for simplicity, and with a spade, or chisel shapedtip 114′. - Referring to FIGURE 15, the forward end structure of FIGURE 12 is repeated except that the threaded
nozzle tip 120 is shown replaced by a heavy duty, internally threadedtip 170. - FIGURE 16 illustrates the same structure again except that the special, internally threaded
tip 172 in this case is in the form of a rectangular oven over theperipheral edges 174 of which the hot gas flows when placed closely over a surface mounted circuit board device. With such a tip all the soldering terminals of such a surface mounted device may be melted at one time for ease of soldering or desoldering it with respect to the circuit board. - Referring to FIGURE 17, the basic structure shown in FIGURE 1 is illustrated showing, however, a number of additional or alternative features of a hot gas soldering system which may be considered to be essentially self contained. To this end a compact
electric compressor 180 is mounted within thebase housing 20 with its associated control unit 182. The compressor may be controlled with respect to its on or off modes by thetoggle switch 40, by afoot switch 184, or by acontact switch 186 which is activated by withdrawal of thesoldering unit 12 from itsholder 18. Either of the latter type of controls may be used on a "momentary contact" basis whereby the compressor operates and supplies air flow only when actually desired thus minimizing power consumption, wear on the compressor's mechanical parts, and noise in the environment of the tool. Further in the latter regard a filter-muffler unit 188 may be carried by thehousing 20 further to quiet the operation of the compressor. - Utilizing the input to the compressor as a vacuum source is a major feature of this example of the invention. A
vacuum hose 190 terminated in avacuum nozzle 192 may be used for noxious soldering fumes removal at the workpiece and/or for desoldering when desired. For utilization in such mode, thenozzle 192 preferably contains a removeable filter system consisting of asteel wool cartridge 191 for collection of course pieces of solder and afelt disc 193 for collecting smaller bits of solder and solidified resin and the like. - The
base housing 20 may also carry atransformer 194 to convert high voltage line power to, for example, 12 or 24 volts for energizing the compressor, the heater, the fiber optics, and all control functions. - There have thus been disclosed and described here a number of examples of a hot gas soldering system which achieves the objects and exhibits the various advantages discussed above.
Claims (10)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19890311638 EP0426919B1 (en) | 1989-11-10 | 1989-11-10 | Hot gas soldering system |
DE1989610131 DE68910131T2 (en) | 1989-11-10 | 1989-11-10 | Hot gas welding system. |
AU45343/89A AU620663B2 (en) | 1989-11-10 | 1989-11-21 | Hot gas soldering system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19890311638 EP0426919B1 (en) | 1989-11-10 | 1989-11-10 | Hot gas soldering system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0426919A1 true EP0426919A1 (en) | 1991-05-15 |
EP0426919B1 EP0426919B1 (en) | 1993-10-20 |
Family
ID=8202845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890311638 Expired - Lifetime EP0426919B1 (en) | 1989-11-10 | 1989-11-10 | Hot gas soldering system |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0426919B1 (en) |
AU (1) | AU620663B2 (en) |
DE (1) | DE68910131T2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0635329A1 (en) * | 1993-07-23 | 1995-01-25 | William Samuel Fortune | Metallic conduction - hot gas soldering - desoldering system |
EP2065657A1 (en) * | 2007-11-28 | 2009-06-03 | Leister Process Technologies | Hot air machine with replaceable nozzle |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112122744B (en) * | 2020-09-24 | 2022-09-13 | 上杭亿德利科技有限公司 | Integrated welding device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0048772A1 (en) * | 1980-09-30 | 1982-04-07 | Cooper Industries, Inc. | Hot-air device for desoldering, soldering, shrinking and the like |
GB2154921A (en) * | 1984-02-24 | 1985-09-18 | Pace Inc | Device for attaching modular electronic components to or removing them from an insulative substrate |
-
1989
- 1989-11-10 DE DE1989610131 patent/DE68910131T2/en not_active Expired - Fee Related
- 1989-11-10 EP EP19890311638 patent/EP0426919B1/en not_active Expired - Lifetime
- 1989-11-21 AU AU45343/89A patent/AU620663B2/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0048772A1 (en) * | 1980-09-30 | 1982-04-07 | Cooper Industries, Inc. | Hot-air device for desoldering, soldering, shrinking and the like |
GB2154921A (en) * | 1984-02-24 | 1985-09-18 | Pace Inc | Device for attaching modular electronic components to or removing them from an insulative substrate |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0635329A1 (en) * | 1993-07-23 | 1995-01-25 | William Samuel Fortune | Metallic conduction - hot gas soldering - desoldering system |
EP2065657A1 (en) * | 2007-11-28 | 2009-06-03 | Leister Process Technologies | Hot air machine with replaceable nozzle |
Also Published As
Publication number | Publication date |
---|---|
EP0426919B1 (en) | 1993-10-20 |
AU4534389A (en) | 1991-06-06 |
AU620663B2 (en) | 1992-02-20 |
DE68910131D1 (en) | 1993-11-25 |
DE68910131T2 (en) | 1994-05-05 |
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